I have a 60,000-100,000 btu propane turbo heater that warms up my 2 car from 30ish to 70ish in about 10-15 minutes. It runs for about 12 hours on a tank of propane,(so it can be a bit expensive when really cold, if your shop is non insulated).
I got mine for $99 at home depot 2 years ago, and use it almost everyday, with no headaches or smell. I'll usually run it for 30 minutes to warm up the objects in the garage, then my halogens keep me warm as I move around the car. Best investment as far as heaters are concerned.
For consistent heat I have an electric radiator type heater, just to keep the chill out.
I got mine for $99 at home depot 2 years ago, and use it almost everyday, with no headaches or smell. I'll usually run it for 30 minutes to warm up the objects in the garage, then my halogens keep me warm as I move around the car. Best investment as far as heaters are concerned.
For consistent heat I have an electric radiator type heater, just to keep the chill out.